Albert w



(No Model.)

A. W. BARTHOLOMEW.

KEY FASTENER.

No. 454,449. Patented June 23,1891.

UNITED STATES PATENT OFFICE.

ALBERT IV. BAR'lHOLOMEl/V, OF BOSTON, MASSACHUSETTS, ASSIGN OR TO THOMASC. ASHLEY, OF SAME PLACE.

KEY-FASTENER.

SPECIFICATION forming part of Letters Patent No. 454,449, dated June 23,1891. Application filed April 25, 1889. Renewed May 16, 1891. Serial No.392,949. (No model.)

To aZZ whom it may concern.- that the key cannot be turned while theslide Be it known that I, ALBERT W. BARTHOLO- is in that position.

MEW, of Boston, in the county of Suffolk and Minor features of myinvention will be set State of Massachusetts, have invented a new forthhereinafter.

5 and useful Improvement in Key-Locks, of In the drawings, a is a cuppedor recessed which the following is a specification, referkey-holeescutcheon having the usual keyonce being had to the accompanyingdrawhole a and screw-holes of. This escutcheon ings, in whichmay ofcourse be a casting, but is prefer- Figure 1 is a plan of the front sideof a deably struck up out of sheet metal.

to vice embodying my invention in its preferred In the cup or recess a Imount a slide f,

form. Fig. 2 is a plan of the back side of having one or morebearing-surfaces a b at what is shown in Fig. 1. Fig. 3 is a sectionalone end to engage a bearing-surface 7.; on the view on line 3 3 of Fig.1; Fig. 4, a sectional key (see Figs. 6 and 9) when the bolt of the View011 line 4 4. of Fig. 1. Fig. 5 is a plan look is shot and the key is inthe lock. Slide 15 of the back side of the device shown in Figs. b ispreferably held in this position by a 1 and 2, the key-locking slidebeing in posispring-pawl d, also mounted in the cup or re tion to coverthe key-hole in the escutcheon. cess a (see Fig. 6) and adapted toengage Fig. 6 shows the device applied to a lock, the teeth 11 on oneedge of slide 12. In this form key being locked in (the lock the bolt ofwhich of my device slide b is provided with a finger- 20 is shot) by thekey-locking slide shown in dotpiece 1, which projects through thekey-hole ted lines. Figs. 7 and 8 show a modification, a, andspring-pawl d is also provided with a Fig. 8 being a section on line 8 8of Fig. 7. finger-piece 2, which projects through an Fig. 9 shows a key,the shank of which is opening a in the escutcheon. The toothed formedwith a flat bearing-surface. slide 1) and spring-pawl are the best means2 5 The object of my invention is to produce a known to me for lockingthe key in its lock,

simple, neat, and strong device for locking and the construction setforth is the best at keys in looks, so that the keys cannot be presentknown to me as an embodiment of turned from the other side of the door;and my invention. The slide 1) slides against the my invention consistsin the combination minor edges of the rim of the cupped escutchohereinafter set forth. eon as it is moved from one position to an- Oneof the chief features of my construcother, and when in position to lockthe key in tion the combination of a cupped or reits lock is kept frombeing tipped on the gassed key-hole escutcheon with a key-lockshank ofthe key as a fulcrum, and so pering mechanism mounted in the recess inthe haps allow the key to be turned fro ith t 3 5 escutcheon. so as toprotect and hide the keyby a pin 3, working in a slot 4, as shown.

locking mechanism. This isafeature of prac- In Fig. 7 the pin-and-slotarrangement is tical importance, adding to the durability and dispensedwith and the slide 12 mounted beneatness of the device. Moreover, itenables tween one side rim of the es ut h d a me to produce a veryeconomical device, the strip 5, secured in the recess in the escutch- 4ocupped or recessed escutcheons being readily eon, spring pawl dprojecting across this formed f h t tal by dieing and dropstrip toengage the teeth in the edge of slide 0 ping, as will be plain to allskilled in the art. d, (see Fig. 7,) as in the preferred form of my Thekey-locking mechanism is also readily device shown in Figs. 1 to G,inclusive. formed of sheet metal and all the parts are The operation ofmy device is as follows:

45 assembled with rapidity. iVhen the slide 1) is in position to allowthe A second feature of my construction is the passage of the key, (seeFigs. 1 and 2,) the 5 combination of a key-hole escutoheon and a key isinserted and the lock-bolt Z shot. spring-pawl-controlled slide adaptedwhen in Slide 12, is then moved to bring a bearing-surone position toengage the key and lock it, so face against a bearing-surface k on thekey,

from the escutcheon, the pawl being mounted in the recess of theescutcheon and engaging the toothed slide, and the toothed slide beingformed with a bearing-surface to engage the key, all substantially asand for the purpose set forth.

ALBERT WI BARTI-IOLOMEVV.

Witnesses:

EDWARD S. BEACH, H. C. YOUNG.

